Readandwritehiringdatainreal-time
Launch 183+ pre-built ATS integrations today and access normalized hiring data with zero maintenance — all through a unified API.

One request. Every ATS.
Swap the connection_id and the same code reads candidates from Greenhouse, Lever, Ashby or any of 183 ATS integrations, in one normalized shape. Every call is live against the source API.
curl --get \
'https://api.unified.to/ats/{connection_id}/candidate' \
--data 'limit=1' \
--header "authorization: bearer $UNIFIED_API_KEY"[
{
"id": "6a1f3c09d2e84b0012ab77c1",
"created_at": "2026-10-02T13:05:41.000Z",
"updated_at": "2026-10-20T17:48:12.000Z",
"name": "Priya Shah",
"first_name": "Priya",
"last_name": "Shah",
"title": "Senior Backend Engineer",
"company_name": "Acme Robotics",
"emails": [{ "email": "priya@example.com", "type": "HOME" }],
"telephones": [{ "telephone": "+1-555-987-6543", "type": "MOBILE" }],
"tags": ["referral"],
"job_ids": ["6a1f2b88d2e84b0012ab6f20"]
}
]No credit card required. Get your API key, connect real accounts, and make live calls like this one in minutes.
The modern Unified API+MCP platform, built differently
Real-time, pass-through
Every request hits the source API live. No caching or sync jobs: reads and writes go to the source API, and native and virtual webhooks report changes on supported integrations.
No customer records at rest
No customer records at rest; connection credentials and operational metadata are encrypted at rest. Each workspace runs in one region: US on every plan, EU or AU on Pro and Scale.
Common objects across every category
Unified objects, endpoints, scopes and errors across every category, plus raw payloads when you need vendor-specific fields.
Custom fields & objects
Read and write custom fields through the Metadata API; reach custom objects through raw fields and the Passthrough API.
AI-ready integrations
Built for AI products: Unified MCP gives LLMs scoped access to integration tools, with options to limit permissions and hide sensitive fields.
Predictable pricing, no lock-in
Usage-based pricing that scales with API volume, not with the number of customers you connect. Own your credentials and export them anytime; tokens issued to your own OAuth app keep refreshing after you leave.
Get integrations from backlog to production in days
1. Activate integrations
Enable integrations across 38 API categories, from HR & Directory to ATS and CRM

2. Launch integrations
Build, test, and launch multiple integrations simultaneously with only a few lines of code.

3. Authorize integrations
Embed our authorization component to let customers easily link their accounts.

Authorization handled for you
A pre-built authorization component and API handle each vendor's sign-in, so your code works with a connection ID.
See documentationBusiness Login
Sign users in with the software their company already runs on. Redirect them to one Unified URL and get back their verified email and name. No OAuth flows to build, no tokens to store.
Built on OpenID Connect (OIDC), OAuth2, and SAML specifications.
Unified supports 323+ sign-in integrations.
Trusted by developers and product teams worldwide










Fresh data to fuel countless use cases
Power AI copilots, insights, predictive analysis, and automation with a modern integration infrastructure that scales alongside you.
Source Candidates
Enable users to source candidates and send updates back to their ATS.
Assess Candidates
Trigger assessments and send updates back to your users' ATS.
Promote Jobs
Enable users to post to multiple job boards and send updates to their ATS.
Track Applications
Enable real-time updates and communication on candidate statuses from any ATS.
Build with a unified ATS API
Read and write data from multiple ATS integrations
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